Method parseCatchClause

src/parser.ts:2567–2598

()

    // https://tc39.github.io/ecma262/#sec-try-statement

    parseCatchClause(): Node.CatchClause {
        const node = this.createNode();

        this.expectKeyword('catch');

        this.expect('(');
        if (this.match(')')) {
            this.throwUnexpectedToken(this.lookahead);
        }

        const params: any[] = [];
        const param = this.parsePattern(params);
        const paramMap = {};
        for (let i = 0; i < params.length; i++) {
            const key = '$' + params[i].value;
            if (Object.prototype.hasOwnProperty.call(paramMap, key)) {
                this.tolerateError(Messages.DuplicateBinding, params[i].value);
            }
            paramMap[key] = true;
        }

        if (this.context.strict && param.type === Syntax.Identifier) {
            if (this.scanner.isRestrictedWord((param as Node.Identifier).name)) {
                this.tolerateError(Messages.StrictCatchVariable);
            }
        }

        this.expect(')');
        const body = this.parseBlock();

        return this.finalize(node, new Node.CatchClause(param, body));
    }

    parseFinallyClause(): Node.BlockStatement {
        this.expectKeyword('finally');